(2)(-x^2+8)=

Solution for (2)(-x^2+8)= equation:

Simplifying
(2)(-1x2 + 8) = 0

Reorder the terms:
2(8 + -1x2) = 0
(8 * 2 + -1x2 * 2) = 0
(16 + -2x2) = 0

Solving
16 + -2x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-16' to each side of the equation.
16 + -16 + -2x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -2x2 = 0 + -16
-2x2 = 0 + -16

Combine like terms: 0 + -16 = -16
-2x2 = -16

Divide each side by '-2'.
x2 = 8

Simplifying
x2 = 8

Take the square root of each side:
x = {-2.828427125, 2.828427125}